This screw is made of high quality brass. It is not easy to rust, lightweight and durable material for long term use. Replacement solid brass click mechanism. There is a stainless steel spring in the screw, durable and rust-proof. The use of a spring mechanism and thread promotes a pop-up effect. Simple operation, quick installation and disassembly, saving time and labor. A great replacement part for pop-up drain valves in sinks. This replacement screw can be used for most kitchen sink drain plugs. Serves as a replacement part for pop-up sink drain valves. Easy to install, hardware and gaskets are included, a perfect accessory for brass bathtub stoppers. -This screw is made of high quality brass. It is not easy to rust, lightweight and durable material for long term use. -The use of a spring mechanism and thread promotes a pop-up effect. -Simple operation, quick installation and disassembly, saving time and labor. -This replacement screw can be used for most kitchen sink drain plugs. -Easy to install, hardware and gaskets are included, a perfect accessory for brass bathtub stoppers. Specifications: Material: Brass Size: As Picture Shows Color: Brass Delivery Range: 2 * Drain Bolts